Question 1

The standard deviation of __________ is generally referred to as the standard error (SE)in research articles.

Accepted Answer

the distri

Question 2

For the following question(s): A researcher is interested in whether the color of an animal's surroundings affects learning rate. She tests 16 rats in a box with colorful wallpaper. Assume that it is known that the average rat can learn to run this particular maze (in a box without any special coloring)in 25 trials, with a variance of 64; the distribution is normal. The mean number of trials to learn the maze for the group with the colorful wallpaper is 11.
-What is the standard deviation of the distribution of means?

Accepted Answer

A) 64/16 = 4.00 
B) square root of (64/16)= 2.00 
C) 64/11 = 5.82 
D) square root of (64/11)= 2.41 
A) 64/16 = 4.00 
B) square root of (64/16)= 2.00 
C) 64/11 = 5.82 
D) square root of (64/11)= 2.41

Question 3

The best estimate of the population mean is the:

Accepted Answer

A) population median 
B) sample mode 
C) sample median 
D) sample mean 
A) population median 
B) sample mode 
C) sample median 
D) sample mean

Question 4

For the 95% confidence interval, the Z scores utilized to form the interval are:

Accepted Answer

The answer of For the 95% confidence interval, the Z...

Question 5

For a particular known population, the mean is 100 and the variance is 25. A researcher conducts a study in which 10 participants are exposed to an experimental procedure. To test the hypothesis that the population these 10 participants represent is different from the known population, the comparison distribution's mean and variance would be:

Accepted Answer

A) mean = 10, variance = 2.5 
B) mean = 10, variance = 5 
C) mean = 100, variance = 2.5 
D) mean = 100, variance = 5 
A) mean = 10, variance = 2.5 
B) mean = 10, variance = 5 
C) mean = 100, variance = 2.5 
D) mean = 100, variance = 5

Question 6

The 95% confidence interval:

Accepted Answer

A) will be narrower than the 99% confidence interval 
B) will be wider than the 99% confidence interval 
C) will have the same upper limit as the 99% confidence interval but a different lower limit 
D) will have the same lower limit as the 99% confidence interval but a different upper limit 
A) will be narrower than the 99% confidence interval 
B) will be wider than the 99% confidence interval 
C) will have the same upper limit as the 99% confidence interval but a different lower limit 
D) will have the same lower limit as the 99% confidence interval but a different upper limit

Question 7

Suppose the sample mean's score on the comparison distribution is more extreme than the cutoff. What would the researcher conclude regarding the colorful wallpaper?

Accepted Answer

A) She should reject the null hypothesis that the rats in the sample will learn faster. 
B) The wallpaper did not have a significant effect on the rate of learning. 
C) The color of the chamber had a significant effect on the rate of learning. 
D) The results are inconclusive since the null hypothesis cannot be rejected. 
A) She should reject the null hypothesis that the rats in the sample will learn faster. 
B) The wallpaper did not have a significant effect on the rate of learning. 
C) The color of the chamber had a significant effect on the rate of learning. 
D) The results are inconclusive since the null hypothesis cannot be rejected.

Question 8

The shape of the distribution of means is __________.

Accepted Answer

The answer of The shape of the distribution of means...

Question 9

A 99% confidence interval is the region:

Accepted Answer

A) that you are 99% confident includes the true population mean 
B) that you are 1% confident includes the true population mean 
C) that includes 49% of the scores below the point estimate of the mean and 50% of the scores above the point estimate of the mean 
D) that includes 50% of the scores below the point estimate of the mean and 49% of the scores above the point estimate of the mean 
A) that you are 99% confident includes the true population mean 
B) that you are 1% confident includes the true population mean 
C) that includes 49% of the scores below the point estimate of the mean and 50% of the scores above the point estimate of the mean 
D) that includes 50% of the scores below the point estimate of the mean and 49% of the scores above the point estimate of the mean

Question 10

The standard deviation of the distribution of means is also known as the:

Accepted Answer

A) population standard deviation 
B) variance of the error mean 
C) standard error of the population 
D) standard error of the mean 
A) population standard deviation 
B) variance of the error mean 
C) standard error of the population 
D) standard error of the mean

Question 11

For the following question(s): A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for their fathers. She has found that for the general population the distribution is skewed to the right, the mean degree of affection is 60, and the standard deviation is 16. The researcher now is wondering if men who themselves have just become new fathers will score higher on the scale than men in general. She samples a group of 100 new fathers and finds that their mean is 64.5.
26 What is the research hypothesis?

Accepted Answer

A) There will be no significant differences between the two populations. 
B) The population of new fathers has a higher mean than the mean of the population of men in general. 
C) The sample size will significantly affect the level of affection experienced. 
D) The two populations (of men in general and of new fathers)have different variances.
Answer: B
-What is the variance on this questionnaire in the general population? 
A) 16 
B) 320 
C) 256 
D) 500 
A) There will be no significant differences between the two populations. 
B) The population of new fathers has a higher mean than the mean of the population of men in general. 
C) The sample size will significantly affect the level of affection experienced. 
D) The two populations (of men in general and of new fathers)have different variances.
Answer: B
-What is the variance on this questionnaire in the general population? 
A) 16 
B) 320 
C) 256 
D) 500

Question 12

A(n)__________ is the name of the hypothesis-testing procedure used when there is a single sample and a known population.

Accepted Answer

The answer of A(n)__________ is the name of the hypothesis-testing...

Question 13

When conducting a study involving a sample of several people to see whether they represent a population different from some known population, the __________ is a distribution of means.

Accepted Answer

comparison

Question 14

A researcher explained that the average amount of hours studied by students per week in a particular statistics course was 3.6 with a 95% confidence interval of 2.40-4.8. This would tell you that the true amount of study time is probably between:

Accepted Answer

A) 2.4 and 3.6 
B) 3.6 and 4.8 
C) 2.4 and 4.8 
D) 0 and 1 
A) 2.4 and 3.6 
B) 3.6 and 4.8 
C) 2.4 and 4.8 
D) 0 and 1

Question 15

Dividing the variance of the population of individuals by the number of individuals in each sample gives:

Accepted Answer

A) the standard deviation of the population 
B) the variance of the distribution of means 
C) an estimate of the sample's standard deviation 
D) the average deviation of the distribution of means 
A) the standard deviation of the population 
B) the variance of the distribution of means 
C) an estimate of the sample's standard deviation 
D) the average deviation of the distribution of means

Question 16

As the number of individuals in each sample gets larger, the distribution of means:

Accepted Answer

A) begins to look less and less like the normal curve (in terms of shape) 
B) becomes a better approximation of the normal curve (in terms of shape) 
C) becomes more positively skewed 
D) becomes more negatively skewed 
A) begins to look less and less like the normal curve (in terms of shape) 
B) becomes a better approximation of the normal curve (in terms of shape) 
C) becomes more positively skewed 
D) becomes more negatively skewed

Question 17

The difference between creating a Z score from a single score and creating one from a sample mean is that:

Accepted Answer

A) you use the mean and standard deviation from the distribution of means 
B) the estimated population variance is used directly 
C) the difference score is divided by the sample's standard deviation 
D) only the population's mean is used 
A) you use the mean and standard deviation from the distribution of means 
B) the estimated population variance is used directly 
C) the difference score is divided by the sample's standard deviation 
D) only the population's mean is used

Question 18

A(n)__________ is the comparison distribution when testing a hypothesis involving a sample of more than one individual.

Accepted Answer

distributi

Question 19

There is no reason for the mean of a distribution of means to be larger or smaller than the __________.

Accepted Answer

mean of th

Question 20

The mean of a distribution of means is __________ the mean of the population.

Accepted Answer

equal to,

The standard deviation of __________ is generally referred to as the standard error (SE)in research articles.

The best estimate of the population mean is the:

For the 95% confidence interval, the Z scores utilized to form the interval are:

The 95% confidence interval:

Suppose the sample mean's score on the comparison distribution is more extreme than the cutoff. What would the researcher conclude regarding the colorful wallpaper?

The shape of the distribution of means is __________.

A 99% confidence interval is the region:

The standard deviation of the distribution of means is also known as the:

A(n)__________ is the name of the hypothesis-testing procedure used when there is a single sample and a known population.

When conducting a study involving a sample of several people to see whether they represent a population different from some known population, the __________ is a distribution of means.

A researcher explained that the average amount of hours studied by students per week in a particular statistics course was 3.6 with a 95% confidence interval of 2.40-4.8. This would tell you that the true amount of study time is probably between:

Dividing the variance of the population of individuals by the number of individuals in each sample gives:

As the number of individuals in each sample gets larger, the distribution of means:

The difference between creating a Z score from a single score and creating one from a sample mean is that:

A(n)__________ is the comparison distribution when testing a hypothesis involving a sample of more than one individual.

There is no reason for the mean of a distribution of means to be larger or smaller than the __________.

The mean of a distribution of means is __________ the mean of the population.

Displaying the Order in a Group of Numbers Using Tables and Graphs

The Mean, Variance, Standard Deviation, and Z Scores

Correlation and Prediction

Some Key Ingredients for Inferential Statistics: the Normal Curve, Sample Versus Population, and Probability

Introduction to Hypothesis Testing

Making Sense of Statistical Significance: Effect Size and Statistical Power

Introduction to the T Test: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Chi-Square Tests and Strategies When Population Distributions Are Not Normal

Applying Statistical Methods in Your Own Research Project

Filters

Exam 6: Hypothesis Tests With Means of Samples

The standard deviation of __________ is generally referred to as the standard error (SE)in research articles.

The best estimate of the population mean is the:

For the 95% confidence interval, the Z scores utilized to form the interval are:

The 95% confidence interval:

Suppose the sample mean's score on the comparison distribution is more extreme than the cutoff. What would the researcher conclude regarding the colorful wallpaper?

The shape of the distribution of means is __________.

A 99% confidence interval is the region:

The standard deviation of the distribution of means is also known as the:

A(n)__________ is the name of the hypothesis-testing procedure used when there is a single sample and a known population.

When conducting a study involving a sample of several people to see whether they represent a population different from some known population, the __________ is a distribution of means.

A researcher explained that the average amount of hours studied by students per week in a particular statistics course was 3.6 with a 95% confidence interval of 2.40-4.8. This would tell you that the true amount of study time is probably between:

Dividing the variance of the population of individuals by the number of individuals in each sample gives:

As the number of individuals in each sample gets larger, the distribution of means:

The difference between creating a Z score from a single score and creating one from a sample mean is that:

A(n)__________ is the comparison distribution when testing a hypothesis involving a sample of more than one individual.

There is no reason for the mean of a distribution of means to be larger or smaller than the __________.

The mean of a distribution of means is __________ the mean of the population.

Displaying the Order in a Group of Numbers Using Tables and Graphs

The Mean, Variance, Standard Deviation, and Z Scores

Correlation and Prediction

Some Key Ingredients for Inferential Statistics: the Normal Curve, Sample Versus Population, and Probability

Introduction to Hypothesis Testing

Making Sense of Statistical Significance: Effect Size and Statistical Power

Introduction to the T Test: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Chi-Square Tests and Strategies When Population Distributions Are Not Normal

Applying Statistical Methods in Your Own Research Project

Filters